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149 lines
4.1 KiB
Python
149 lines
4.1 KiB
Python
# flake8: noqa=E501
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"""Test SQL database wrapper."""
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from sqlalchemy import (
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Column,
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Integer,
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MetaData,
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String,
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Table,
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Text,
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create_engine,
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insert,
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)
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from langchain.sql_database import SQLDatabase, truncate_word
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metadata_obj = MetaData()
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user = Table(
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"user",
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metadata_obj,
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Column("user_id", Integer, primary_key=True),
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Column("user_name", String(16), nullable=False),
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Column("user_bio", Text, nullable=True),
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)
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company = Table(
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"company",
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metadata_obj,
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Column("company_id", Integer, primary_key=True),
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Column("company_location", String, nullable=False),
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)
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def test_table_info() -> None:
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"""Test that table info is constructed properly."""
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engine = create_engine("sqlite:///:memory:")
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metadata_obj.create_all(engine)
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db = SQLDatabase(engine)
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output = db.table_info
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expected_output = """
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CREATE TABLE user (
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user_id INTEGER NOT NULL,
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user_name VARCHAR(16) NOT NULL,
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user_bio TEXT,
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PRIMARY KEY (user_id)
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)
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/*
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3 rows from user table:
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user_id user_name user_bio
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/*
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CREATE TABLE company (
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company_id INTEGER NOT NULL,
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company_location VARCHAR NOT NULL,
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PRIMARY KEY (company_id)
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)
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/*
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3 rows from company table:
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company_id company_location
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*/
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"""
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assert sorted(" ".join(output.split())) == sorted(" ".join(expected_output.split()))
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def test_table_info_w_sample_rows() -> None:
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"""Test that table info is constructed properly."""
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engine = create_engine("sqlite:///:memory:")
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metadata_obj.create_all(engine)
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values = [
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{"user_id": 13, "user_name": "Harrison", "user_bio": "bio"},
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{"user_id": 14, "user_name": "Chase", "user_bio": "bio"},
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]
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stmt = insert(user).values(values)
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with engine.begin() as conn:
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conn.execute(stmt)
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db = SQLDatabase(engine, sample_rows_in_table_info=2)
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output = db.table_info
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expected_output = """
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CREATE TABLE company (
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company_id INTEGER NOT NULL,
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company_location VARCHAR NOT NULL,
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PRIMARY KEY (company_id)
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)
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/*
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2 rows from company table:
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company_id company_location
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*/
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CREATE TABLE user (
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user_id INTEGER NOT NULL,
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user_name VARCHAR(16) NOT NULL,
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user_bio TEXT,
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PRIMARY KEY (user_id)
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)
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/*
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2 rows from user table:
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user_id user_name user_bio
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13 Harrison bio
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14 Chase bio
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*/
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"""
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assert sorted(output.split()) == sorted(expected_output.split())
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def test_sql_database_run() -> None:
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"""Test that commands can be run successfully and returned in correct format."""
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engine = create_engine("sqlite:///:memory:")
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metadata_obj.create_all(engine)
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stmt = insert(user).values(
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user_id=13, user_name="Harrison", user_bio="That is my Bio " * 24
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)
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with engine.begin() as conn:
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conn.execute(stmt)
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db = SQLDatabase(engine)
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command = "select user_id, user_name, user_bio from user where user_id = 13"
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output = db.run(command)
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user_bio = "That is my Bio " * 19 + "That is my..."
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expected_output = f"[(13, 'Harrison', '{user_bio}')]"
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assert output == expected_output
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def test_sql_database_run_update() -> None:
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"""Test commands which return no rows return an empty string."""
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engine = create_engine("sqlite:///:memory:")
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metadata_obj.create_all(engine)
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stmt = insert(user).values(user_id=13, user_name="Harrison")
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with engine.begin() as conn:
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conn.execute(stmt)
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db = SQLDatabase(engine)
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command = "update user set user_name='Updated' where user_id = 13"
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output = db.run(command)
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expected_output = ""
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assert output == expected_output
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def test_truncate_word() -> None:
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assert truncate_word("Hello World", length=5) == "He..."
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assert truncate_word("Hello World", length=0) == "Hello World"
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assert truncate_word("Hello World", length=-10) == "Hello World"
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assert truncate_word("Hello World", length=5, suffix="!!!") == "He!!!"
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assert truncate_word("Hello World", length=12, suffix="!!!") == "Hello World"
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